| 摘要 |
A butterfly needle system provides a housing including a hollow central hub and a winged extension projecting from each side of the hub. The central hub has front and rear ends and a clip opening on an outer surface thereof. The needle cannula has a sharpened first end and extends axially through the central hub. A retaining clip is disposed on the outer surface of the central hub and extends at least partially through the clip opening. When the needle cannula is positioned in the normal extended position with the sharpened first end extending through the forward end of the hub, a lower terminal end of the retaining clip is held biased against the needle cannula. When the needle cannula is positioned in a retracted position with the sharpened first end housed within the central hub, the lower terminal end of the retaining clip is disposed in an active position adjacent the inner wall surface of the hub generally opposite to the clip opening. The needle cannula in the retracted positioned is disposed rearward of the clip opening in the central hub and the retaining clip disposed in the active position extends substantially through the vertical plane of the central hub to thereby retain the needle cannula within the central hub.
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